"the programmers available on the net use a preprogrammed 89c2051 and a latch for controlling programming."

So where is the problem ?

You dont like the looks of 89c2051 or you dont have access to the required hex dump ? There a hexdump available that is meant to be used with the 89c2051. Send me a line if you need it.

( Watch out - not many around this place like the idea of building programmers at home- but that is your problem to handle!! )

Raghu